/*
 * Copyright (c) 2004-2022, University of Oslo
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 * Neither the name of the HISP project nor the names of its contributors may
 * be used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.hisp.dhis.calendar;

import javax.annotation.Nonnull;

/**
 * Class representing a date interval.
 *
 * @author Morten Olav Hansen <mortenoh@gmail.com>
 * @see DateTimeUnit
 * @see Calendar
 */
public class DateInterval {
  /** Start of interval. Required. */
  @Nonnull private final DateTimeUnit from;

  /** End of interval. Required. */
  @Nonnull private final DateTimeUnit to;

  /** Interval type this interval represents. */
  private DateIntervalType type;

  public DateInterval(DateTimeUnit from, DateTimeUnit to) {
    this.from = from;
    this.to = to;
  }

  public DateInterval(DateTimeUnit from, DateTimeUnit to, DateIntervalType type) {
    this.from = from;
    this.to = to;
    this.type = type;
  }

  public DateTimeUnit getFrom() {
    return from;
  }

  public DateTimeUnit getTo() {
    return to;
  }

  public DateIntervalType getType() {
    return type;
  }

  @Override
  public boolean equals(Object o) {
    if (this == o) return true;
    if (o == null || getClass() != o.getClass()) return false;

    DateInterval that = (DateInterval) o;

    if (from != null ? !from.equals(that.from) : that.from != null) return false;
    if (to != null ? !to.equals(that.to) : that.to != null) return false;
    if (type != that.type) return false;

    return true;
  }

  @Override
  public int hashCode() {
    int result = from != null ? from.hashCode() : 0;
    result = 31 * result + (to != null ? to.hashCode() : 0);
    result = 31 * result + (type != null ? type.hashCode() : 0);
    return result;
  }

  @Override
  public String toString() {
    return "DateInterval{" + "from=" + from + ", to=" + to + ", type=" + type + '}';
  }
}
